Key bacterial groups maintain stream multifunctionality in response to episodic drying

IF 5.1 2区 地球科学 Q1 LIMNOLOGY Limnology and Oceanography Letters Pub Date : 2024-04-30 DOI:10.1002/lol2.10400
Giulia Gionchetta, Rebeca Arias-Real, Pilar Hurtado, Helmut Bürgmann, Cayetano Gutiérrez-Cánovas
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Abstract

Microbial biodiversity is fundamental to maintain ecosystem functioning in seasonally variable ecosystems. However, it remains unclear how alterations in water availability caused by episodic drying compromise the ability of stream microbes to maintain multiple functions simultaneously (e.g., primary production and carbon cycling). Using data from 32 streams, we investigated how the phenology of annual drying influences stream sediment microbial biodiversity and their capacity to sustain multifunctionality. Our results showed that stream multifunctionality and most bacteria did not respond to changes in drying phenology. Only two bacterial groups, the drying-resistant Sphingobacteriia and the drying-sensitive Acidobacteria_Gp7, exhibited positive associations with multifunctionality; whereas, bacterial diversity showed a negative correlation with functions. Among these biodiversity aspects, Sphingobacteriia showed the strongest capacity to maintain multifunctionality at low and moderate performance levels. Our findings will help to better understand the mechanisms through which biodiversity sustains the functioning of seasonally variable streams and their responses to global change.

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关键细菌群在应对偶发性干燥时维持溪流的多功能性
微生物的生物多样性是维持季节性多变生态系统功能的基础。然而,目前仍不清楚偶发性干燥引起的水供应变化如何影响溪流微生物同时维持多种功能(如初级生产和碳循环)的能力。利用来自 32 条溪流的数据,我们研究了每年干旱的物候如何影响溪流沉积物微生物的生物多样性及其维持多功能的能力。结果表明,溪流的多功能性和大多数细菌对干燥物候的变化没有反应。只有两个细菌群,即抗干燥的鞘氨醇杆菌和对干燥敏感的酸杆菌_Gp7,与多功能性呈正相关;而细菌多样性与功能呈负相关。在这些生物多样性方面,鞘氨醇杆菌在低度和中度性能水平下保持多功能性的能力最强。我们的发现将有助于更好地理解生物多样性维持季节性变化溪流功能的机制及其对全球变化的响应。
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来源期刊
CiteScore
10.00
自引率
3.80%
发文量
63
审稿时长
25 weeks
期刊介绍: Limnology and Oceanography Letters (LO-Letters) serves as a platform for communicating the latest innovative and trend-setting research in the aquatic sciences. Manuscripts submitted to LO-Letters are expected to present high-impact, cutting-edge results, discoveries, or conceptual developments across all areas of limnology and oceanography, including their integration. Selection criteria for manuscripts include their broad relevance to the field, strong empirical and conceptual foundations, succinct and elegant conclusions, and potential to advance knowledge in aquatic sciences.
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